Improvement in feed-dogs for sewing-machines



H. FEYH.

FEED-DOG FOR SEWING-MACHINE.

No. 189,716. Patented April 17. 1877.

UNITED STATES HENRY FEYH, OF NEW YORK,

PATENT Orrron.

N. Y., ASSIGNOR TO SETH W. JOHNSON, OF SAME PLACE.

IMPROVEMENT IN FEED-DOGS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 189,716, dated April 17, 1877; application filed February 7, 1877 To all whom it may concern:

Be it known that I, HENRY FEYH, of the city, county, and State of New York, have invented a new and useful Improvement in Feed-Dogs for Sewing-Machines, which improvement is fully set forth in the following specification, reference being had to the accompanying drawing, in which- Figure 1 represents a plan or top view of a circular feed-dog constructed according to my thread from catching in the teeth of the feeddog.

In double-thread sewing-machines, the lower thread, particularly if it is hard twisted, is liable to twist and to curl up, and as it comes in contact in this state with the edge of the feed-dog it catches in the teeth of the same, and the operation of the machine is disturbed.

This occurs very frequently in sewing-machines with a universal feed, since in sewing round various curves the tendency of the lower thread to twist and curl up is increased, and in the example represented in Figs. 1 and 2 of the drawing, I have shown a feed-dog, A, such as used in universal-feed sewingmachines. This feeddog is circular, and provided with teeth a, which may be made to extend clear round in an unbroken circle, or which may be made to occupy only sections of a circle. Outside of these teeth is a smooth rim, 1), so that if the lower thread curls up and bears against any portion of the edge of the feed-dog, it is not liable to catch in the teeth of the same.

What I claim as new, and desire to secure by Letters Patent, is

The circular feed-dog A, having the circularly-arranged teeth a, and constructed with the circumferential smooth flange 10 outside of the teeth, as and for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 31st day of January, 1877.

HENRY FEYH. [L. s.|

Witnesses:

W. HAUFF, E. F. KASTENHUBER. 

